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From "Michael Park" <>
Subject Re: Review Request 31183: Factored out sum function for Resources.
Date Tue, 03 Mar 2015 07:21:04 GMT

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(Updated March 3, 2015, 7:21 a.m.)

Review request for mesos, Alexander Rukletsov, Benjamin Hindman, Ben Mahler, and Jie Yu.

Bugs: MESOS-2373

Repository: mesos

Description (updated)

This is the start of a patch chain for converting `Resources` to `hashmap<SlaveID, Resources>`
in places where we have an aggregate of resources across multiple slaves. In short, scalar
resources aggregate correctly across multiple slaves, but non-scalar resources (e.g. ports)
do not aggregate correctly. Please refer to the JIRA ticket for further details.

The function `sum` is factored out to facilitate small patches. The following is the strategy
and why this function will be useful:

(1) Update a variable `resources` in a component (e.g. master) from `Resources` to `hashmap<SlaveID,
(2) For callsites where we pass `resources` to another component (e.g. allocator), we'll pass
`sum(resources.values())` instead to preserve the existing behavior in the other component.


  include/mesos/resources.hpp da6d48871a0061d8bbf5e681dd6e7edac659d812 
  src/master/allocator/mesos/hierarchical.hpp c0b1da75565d9dc7728c5566f01815234163fc47 
  src/tests/hierarchical_allocator_tests.cpp 93753d1c04159a04a733927a487eb69505438e32 



make check


Michael Park

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